| How Are "Crest Whitestrips SupremeŽ" Different From The Whitestrips Sold in Stores? "Crest Whitestrips SupremeŽ":
- Are available only through your dentist (Dr. Loewen).
- Are the best whitening Crest offers.
- Have a higher concentration of hydrogen peroxide for improved whitening.
- Includes a 21-day supply of strips.
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